Prior to the performance, Grohl praised Farrell as “the one person responsible for that revolution in music… thank god for that first Lollapalooza,” the singer told the roughly 1,100 people at Chicago’s Metro.

Farrell is one of the co-founders of Lollapalooza, which was initially conceived as a roving farewell tour for Jane’s Addiction in 1990 before becoming a stationary Windy City summer festival in 2005.

On Friday, Foo Fighters – who are not scheduled to perform at this year’s Lollapalooza – played a massive 32-song concert that featured five cuts off their upcoming, Paul McCartney-featuring LP Concrete & Gold: “The Sky Is a Neighborhood,” “Run,” “Sunday Rain,” La Dee Da” and “Dirty Water.”